The surface chemistry of small hydrocarbons on clean and oxygen-modified Mo(100)

The surface chemistry of ethylene, propylene and 2-butenes on clean and oxygen-modified Mo(100) has been studied by TPD UPS and RAIRS to shed some light on the catalytic mechanism of olefin metathesis in heterogeneous phase. The currently accepted mechanism for olefin metathesis in homogeneous phase is the so-called "carbene-metallacyclobuatane". The kinetic studies of small olefin metathesis on molybdenum model catalysts also suggest that a "carbene" mechanism operates in heterogeneous phase.;It is found that olefins adsorb on clean and oxygen-covered Mo(100) predominantly by donation of ;The carbene chemistry on O/Mo(100) is investigated by grafting:CH...